Elements of the Petrographic Study of Bonding Clays and of the Clay Substance of Molding Sands / Mineral Composition and Texture of Clay Substance of Natural Molding Sands / The Relationship Between the Physical and Mineralogical Characteristics of Bonding Clays; Report of Investigations No. 69;
Grim, R. E., Carl E. Schubert and Richards A. Rowland:
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